The Podcaster Subscribtion stopped working?

We upload the m4a-file on archive.org and then we're using wordpress.com and feedburner.

First four episodes came up pretty fast in the iPhone Podcaster App.
But after the fourth they ended.
iTunes on the computer downloads it immediately. But the listeners using the Podcaster App have been asking us "When does the next episode come up?" and there's been 5 after what they've got.
One have showed up after a few days. But the last three haven't showed up at all.
Those who show up are titled "oscarochmartin" - our WP-name.
Not the episode name.

BUT if I go to iTunes Store in the iPhone - every episode is to be found there and with the right episode name.
In computer iTunes - The covere picture is gone. BUT it's there in Podcaster App instead.

Anyone know any solution of this?
We want our listeners to rely on us. But we need to rely on WP or where the problem now might be.